Daikin RQYQ140-180PY1 Service Manual page 187

SiBE341001
Troubleshooting
Troubleshooting
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Diagnosis Flow 5
Confirmation of malfunction 3 Confirmation of malfunction 4
BS malfunction (Excessive number of indoor
units connected)
Is the number of indoor
units downstream of BS
within the specified
number?
YES
Diagnosis Flow 6
Confirmation of malfunction 3 Confirmation of malfunction 4
Faulty wiring between outdoor units
and BS units.
Is the wiring
between the outdoor
unit and the BS unit
correct?
YES
Troubleshooting by Remote Controller
NO
NO
Decrease the number of indoor
units downstream of BS to the
specified number or fewer.
Replace the outdoor unit PCB.
Correct the wiring.
Replace the outdoor unit PCB.
178